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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A074877 Number of function calls required to compute ack(3,n), where ack denotes the Ackermann function.

Table of values

n a(n)
0 15
1 106
2 541
3 2432
4 10307
5 42438
6 172233
7 693964
8 2785999
9 11164370
10 44698325
11 178875096
12 715664091
13 2862983902
14 11452590817
15 45811673828
16 183249316583
17 733002509034
18 2932020521709
19 11728103058160
20 46912454175475
21 187649900587766
22 750599770123001
23 3002399416036092

List of values

[15, 106, 541, 2432, 10307, 42438, 172233, 693964, 2785999, 11164370, 44698325, 178875096, 715664091, 2862983902, 11452590817, 45811673828, 183249316583, 733002509034, 2932020521709, 11728103058160, 46912454175475, 187649900587766, 750599770123001, 3002399416036092]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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